Unknown NWSLIs used in SHEF Products

The IEM attempts to process all SHEF encoded products that come via a
NOAAPort data stream. The identifiers used by the stations reported in this
data feed are supposed to adhere the SHEF Manual
specification for site identifiers. The most common set of identifiers are
found within the National Weather Service Location Identifier (NWSLI) database.
Unfortunately, not all site ids used by issuance centers are contained within
NWSLI. This page lists out unknown NWSLI'ish identifiers. The IEM attempts
to rectify this list daily, so there may be some false positive listed. The
IEM maintains a week of raw SHEF data, so links to indicated products
older than a week old will not work.